With the steroid era behind it, Major League Baseball has turned its attention to the energy drink era. Really.

According to USA Today, the Arizona Diamondbacks and Houston Astros no longer provide energy drinks in their clubhouses and are encouraging their players to avoid them. The Milwaukee Brewers have taken a similar course of action in their minor league system.

In 2009, Astros pitcher Wesley Wright was hospitalized for dehydration after drinking several cans of Red Bull. (AP Photo)

In 2009, Houston pitcher Wesley Wright was hospitalized for dehydration after drinking several cans of Red Bull, causing the Astros to toughen their stance.

"We've had a couple of issues regarding dehydration, and our people think they can be traced to misuse, overuse of energy drinks. It just seemed that we shouldn't be creating an environment where we're almost facilitating the effects of dehydration," Astros general manager Ed Wade told USA Today.

MLB's drug enforcement policy, which bans performance-enhancing drugs, went into effect in 2004. And amphetamines were banned the following year. But there is no such ban on energy drinks, which are high in caffeine.